Halogen anthraquinone acridones



Patented Mar. 29, 1932 UNITED STATES WALTER BRUCK, OF MANNHEIM,

GERMANY, ASSIGNOB. T0, GENERAL ANILINE weeks,

I INC., NEW YORK, N. Y., A CORPORATION 0F DELAWARE v HALOGEN ANTHRAQUINON'E Acnrnolvns No Drawing. Application filed .Tune 5, 1930, Se1ia1 No. 459,426, and in Germany June 10,1929." 7 i The present invention relates to the production of halogen derivatives of anthraquinone-2.1 (N) -benzacridone.

I have found that halogen derivatives of anthraquinone-2.l (N) -benzacridone corresponding to the formula:

Hal 2 4 HN 1 l L Hal are valuable vat dyestufis in view of the brilliant dyeings they produce on cotton. While the tetra-chloroanthraquinone-2l (N) benzacridone containing the four halogen atoms in the benzene nucleus dyes cotton orange shades, the 41322.3. l-tetrachloroanthraquinone-2.1(N) -benzacridone dyes. cotton liant red shades with a bluish tinge. Apparently it is not the number of halogen atoms present in the molecule but their position in the molecule which is determinative of the shade of dyeing of tetrahalogenanthraquinone-2.1 (N) -benzacridones.

The 4322.3.-tetrahalogenanthraquinone- 2.1(N) -benzacridones may be produced by treating with halogenating agents those anthraquinone-2.1 (N) -benzacridones the benzene'nucleus of which is substituted by halogen at least in Bzo-position free from halogen or by condensing 1. l-dihalogenanthraquinone-Q-carboxylic acids or acid esters with 2.3. l-trihalogen anilines with subsequent ring closure to form acridones.

The following examples will further illustrate how the said invention may be carried out in practice, but the invention is not restricted to these examples. The parts are by '50 weight.

. l0 parts-of 2.3.a-trichloroaniline, fi' parts-of brilthe Bz3-position and has a i I, Erarnplei V f parts of lA-dichlorOanthraquinone-Z- carb'oxylic acid benzyl ester are heated for lhoursatfrom 180to 190 centigradewith anhydrous sodium acetate, 0.8 part-of copper oxide and 30 "parts of nitrobenzene. A fter cooling the melt isintroduced into 20Oparts i oifr concentrated ,sulphuric acid and is stirred for anhour-at'about 30.centigrade. Thesolution is then poured intowater and theni-trobenzene is expelled with, steam. The remaining l-trichloroanilido l chloroanthraquinone-Qrarboxylic acid is filtered bysuction and dried. 7

' Q lparts ofthe acid are stirred for 2 hours at fr0m150tto1559 centigrade with parts ofdry nitrobe'nzene and 10' parts of acetic' acid anhydr'ide. The reaction mass is then diluted with 80 parts ofdry nitrobenzene and 3 parts of concentrated sulphuric acid are. added at 90 centigrade. The whole is then. kept at the same temperature whilestirring for about 3 hours and the reaction productis filtered on" bysuction after'cooling. It is washed with ,nitrobenz'ene, freed from sol ventby steam distillation and from alkalisoluble impurities by boilingupwith dilute sodium carbonate solution. The dyestufii may be crystallized from 'trichlorbenzene.

.Accordingto analysis it contains 4 atomsof chlorine. The colorof the solution in con-' 1 centratedsulphuric acid is orange red and the vat is violet; The product gives brilliant bluish red dyeln-gs of very good -fastnesson cotton. w H

I 5 parts 01i-1322.3. l-trichloroanthraquinone i 2.1-benzacridone (prepared by condensation of 1-chloroanthraquinone-2-carboxylic acid benzyl' ester with 2.3.4-trichl0roaniline,

saponification into the, free acid and condensation of this free acid into acridone) aresuss pended inIQOparts of dry nitrobenzeneand after the addition of 0.4 part of iodine, 15. parts of sulphuryl chloride are gradually introduced while stirring at from to 100 centigrade. The whole is then stirred for no about 5 hours at the same temperature, the excess of sulphuryl chloride is expelled by means of a stream of dry air and after cooling the reaction product is filtered off by suc- 5 tion. It is washed with nitrobenzene and after the addition of sodium carbonate is subjected to steam distillation. The dyestuff which remains behind is filtered off by suction and dried. It may be crystallized from w trichlorbenzene. According to analysis the product is a tetrachloroanthraquinone-2.1- (N) -benzacridone and corresponds in its properties with the dyestufi' obtained in Example 1.

Example After the addition of 0.7 part of iodine, parts of sulphuryl chloride are gradually introduced at from 90 to 100 centigrade into 29 a suspension of 9 parts of Bz3-chloroanthraquinone-2.1(N) -benzacridone obtainable by condensation of l-chloroanthraquinone with 1-amino-3-chloro-6-benzene-carboxylic acid, ring closure then being effected, in 180 parts 25 of nitrobenzene. Stirring is carried on for about 3 hours at the same temperature and the cooled reaction mass is then filtered off by suction. This is then worked up in the manner described in the foregoing examples.

39 According to analysis the product is a tetrachloroanthraquinone -2.1 (N) -benzacridone and practically corresponds in its properties with the products obtained in the foregoing examples. The dyestuflf when heated with diethylaniline in the presence of copper is.

converted into a dyestuff containing less chlorine, dissolving in concentrated sulphuric acid giving an orange yellow solution and dyeing cotton from a violet vat orange red shades.

40 What I claim is 1. As new articles of manufacture 4-1322.- 3.4-tetrahalogenanthraquinone 2.1(N) -benzacridones dissolving in concentrated sulphuric acid to give orange red solutions and dye- (5. ing cotton from violet vats brilliant red shades'with a bluish tinge.

2. As a new article of manufacture eL-BZQL- 3.4; tetrachloroanthraquinone -2.1(N) -benzacridone dissolving in cencentrated sulphuric acid to give an orange red solution and dyeing cotton from a violet vat brilliant red shades with a bluish tinge, the said dyestuff when heated with diethylaniline in the presence of copper being converted into a dyestuif containing less chlorine, dissolving in con centrated sulphuric acid giving an orange yellow solution and dyeing cotton from a violet vat orange red shades.

In testimony whereof I have hereunto set no my hand.

.. WALTER BRUCK. 

